/*
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2006, 2007, 2008
Free Software Foundation, Inc.

This file is part of the GNU MP Library test suite.

The GNU MP Library test suite is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.

The GNU MP Library test suite is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
Public License for more details.

You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite.  If not, see http://www.gnu.org/licenses/.  */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "longlong.h"
#include "tests/tests.h"

#ifdef OPERATION_mul_1
#define func __gmpn_mul_1
#define reffunc refmpn_mul_1
#define funcname "mpn_mul_1"
#endif

#ifdef OPERATION_addmul_1
#define func __gmpn_addmul_1
#define reffunc refmpn_addmul_1
#define funcname "mpn_addmul_1"
#endif

#ifdef OPERATION_submul_1
#define func __gmpn_submul_1
#define reffunc refmpn_submul_1
#define funcname "mpn_submul_1"
#endif

#if defined (USG) || defined (__SVR4) || defined (_UNICOS) || defined (__hpux)
#include <time.h>

int
cputime ()
{
  if (CLOCKS_PER_SEC < 100000)
    return clock () * 1000 / CLOCKS_PER_SEC;
  return clock () / (CLOCKS_PER_SEC / 1000);
}
#else
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>

int
cputime ()
{
  struct rusage rus;

  getrusage (0, &rus);
  return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
}
#endif

static void print_posneg (mp_limb_t);
static void mpn_print (mp_ptr, mp_size_t);

#define LXW ((int) (2 * sizeof (mp_limb_t)))
#define M * 1000000

#ifndef CLOCK
#error "Don't know CLOCK of your machine"
#endif

#ifndef OPS
#define OPS (CLOCK/5)
#endif
#ifndef SIZE
#define SIZE 496
#endif
#ifndef TIMES
#define TIMES OPS/(SIZE+1)
#endif

int
main (int argc, char **argv)
{
  mp_ptr s1, ref, rp;
  mp_limb_t cy_ref, cy_try;
  int i;
  long t0, t;
  unsigned int test;
  mp_limb_t xlimb;
  mp_size_t size;
  double cyc;
  unsigned int ntests;

  s1 = malloc (SIZE * sizeof (mp_limb_t));
  ref = malloc (SIZE * sizeof (mp_limb_t));
  rp = malloc ((SIZE + 2) * sizeof (mp_limb_t));
  rp++;

  ntests = ~(unsigned) 0;
  if (argc == 2)
    ntests = strtol (argv[1], 0, 0);

  for (test = 1; test <= ntests; test++)
    {
#if TIMES == 1 && ! defined (PRINT)
      if (test % (1 + 0x80000 / (SIZE + 20)) == 0)
	{
	  printf ("\r%u", test);
	  fflush (stdout);
	}
#endif

#ifdef PLAIN_RANDOM
#define MPN_RANDOM mpn_random
#else
#define MPN_RANDOM mpn_random2
#endif

#ifdef RANDOM
      size = random () % SIZE + 1;
#else
      size = SIZE;
#endif

      rp[-1] = 0x87654321;
      rp[size] = 0x12345678;

#ifdef FIXED_XLIMB
      xlimb = FIXED_XLIMB;
#else
      MPN_RANDOM (&xlimb, 1);
#endif

#if TIMES != 1
      mpn_random (s1, size);
      mpn_random (rp, size);

      MPN_COPY (ref, rp, size);
      t0 = cputime();
      for (i = 0; i < TIMES; i++)
	func (ref, s1, size, xlimb);
      t = cputime() - t0;
      cyc = ((double) t * CLOCK) / (TIMES * size * 1000.0);
      printf (funcname ":    %5ldms (%.3f cycles/limb) [%.2f Gb/s]\n",
	      t, cyc,
	      CLOCK/cyc*GMP_LIMB_BITS*GMP_LIMB_BITS/1e9);
#endif

#ifndef NOCHECK
      MPN_RANDOM (s1, size);
#ifdef ZERO
      memset (rp, 0, size * sizeof *rp);
#else
      MPN_RANDOM (rp, size);
#endif
#if defined (PRINT) || defined (XPRINT)
      printf ("xlimb=");
      mpn_print (&xlimb, 1);
#endif
#ifdef PRINT
#ifndef OPERATION_mul_1
      printf ("%*s ", (int) (2 * sizeof(mp_limb_t)), "");
      mpn_print (rp, size);
#endif
      printf ("%*s ", (int) (2 * sizeof(mp_limb_t)), "");
      mpn_print (s1, size);
#endif

      MPN_COPY (ref, rp, size);
      cy_ref = reffunc (ref, s1, size, xlimb);
      cy_try = func (rp, s1, size, xlimb);

#ifdef PRINT
      mpn_print (&cy_ref, 1);
      mpn_print (ref, size);
      mpn_print (&cy_try, 1);
      mpn_print (rp, size);
#endif

      if (cy_ref != cy_try || mpn_cmp (ref, rp, size) != 0
	  || rp[-1] != 0x87654321 || rp[size] != 0x12345678)
	{
	  printf ("\n        ref%*s try%*s diff\n", LXW - 3, "", 2 * LXW - 6, "");
	  for (i = 0; i < size; i++)
	    {
	      printf ("%6d: ", i);
	      printf ("%0*llX ", LXW, (unsigned long long) ref[i]);
	      printf ("%0*llX ", LXW, (unsigned long long) rp[i]);
	      print_posneg (rp[i] - ref[i]);
	      printf ("\n");
	    }
	  printf ("retval: ");
	  printf ("%0*llX ", LXW, (unsigned long long) cy_ref);
	  printf ("%0*llX ", LXW, (unsigned long long) cy_try);
	  print_posneg (cy_try - cy_ref);
	  printf ("\n");
	  if (rp[-1] != 0x87654321)
	    printf ("clobbered at low end\n");
	  if (rp[size] != 0x12345678)
	    printf ("clobbered at high end\n");
	  printf ("TEST NUMBER %u\n", test);
	  abort();
	}
#endif
    }
  exit (0);
}

static void
print_posneg (mp_limb_t d)
{
  char buf[LXW + 2];
  if (d == 0)
    printf (" %*X", LXW, 0);
  else if (-d < d)
    {
      sprintf (buf, "%llX", (unsigned long long) -d);
      printf ("%*s-%s", LXW - (int) strlen (buf), "", buf);
    }
  else
    {
      sprintf (buf, "%llX", (unsigned long long) d);
      printf ("%*s+%s", LXW - (int) strlen (buf), "", buf);
    }
}

static void
mpn_print (mp_ptr p, mp_size_t size)
{
  mp_size_t i;

  for (i = size - 1; i >= 0; i--)
    {
#ifdef _LONG_LONG_LIMB
      printf ("%0*lX%0*lX", (int) (sizeof(mp_limb_t)),
	      (unsigned long) (p[i] >> (GMP_LIMB_BITS/2)),
              (int) (sizeof(mp_limb_t)), (unsigned long) (p[i]));
#else
      printf ("%0*lX", (int) (2 * sizeof(mp_limb_t)), p[i]);
#endif
#ifdef SPACE
      if (i != 0)
	printf (" ");
#endif
    }
  puts ("");
}
